Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bfa6c26d40417f101e7bbce7b47eefb8c3b8a3d12795d0c565e8d73d71d059c6' 
  AND token = 'wTjMxEeAHmo5TFAMm5L0E0HHfIc3MwWM5pStakBRMNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}